Target and Equalizer Design for Perpendicular Heat-Assisted Magnetic Recording
Heat-Assisted Magnetic Recording (HAMR) is one of the leading technologies identified to enable areal density beyond 1 Tb/in2 of magnetic recording systems. A key challenge to HAMR designing is accuracy of positioning, timing of the firing laser, power of the laser, thermo-magnetic head, head-disk interface and cooling system. We study the effect of HAMR parameters on transition center and transition width. The HAMR is model using Thermal Williams-Comstock (TWC) and microtrack model. The target and equalizer are designed by the minimum mean square error (MMSE). The result shows that the unit energy constraint outperforms other constraints.
[1] O. Heinonen and K.Z Gao, "Extension of perpendicular recording," Journal of Magnetism and Magnetic Material, 2008, pp.2885-2888.
[2] Y. Shiroishi, K. Fukuda et al., "Future Options for HDD Storage," IEEE Trans. Magn., vol. 45, no. 10, pp. 3816-3822, Oct. 2009.
[3] E.M. Kurtas, M.F. Erden et al., "Future read channel technologies and challenges for high density data storage applications, Acoustics, Speech, and Signal Processing,” Proceedings of ICASSP 2005, pp. 737-740.
[4] T. Rausch, J.A. Bain, D.D. Stancil, and T.E. Schelsinger, "Thermal Williams-Comstock model for predicting transition lengths in heat-assisted magnetic recording system," IEEE Trans. Magn., vol. 40, no. 1, pp. 137-147, Jan. 2004.
[5] M.F. Erden, T. Rausch, W.A. Challener, "Cross-track location and transition parameter effects in heat-assisted magnetic recording,” IEEE Trans. Magn., vol. 41, no. 6, pp.2189-2194, Jun. 2005.
[6] R. Radhakrishnan, M.F. Erden et al., "Transition Response Characteristics of Heat-Assisted Magnetic Recording and Their Performance With MTR Codes," IEEE Trans. Magn., vol. 43, no. 6, pp. 2298-2300, Jun. 2007.
[7] R. Radhakrishnan, B. Vasic, M.F. Erden et al., "Characterization of of Heat-Assisted Magnetic Recording Channels,” DIMACS Series in Discrete Mathematic sand Theoretical Computer Science, vol. 73, pp. 25-41, 2007.
[8] M.H. Kryder, E.C. Gage et al., "Heat-Assisted Magnetic Recording,” Invited Paper Proceedings of the IEEE, vol. 96, no. 11: 1810-1835, Noember. 2008.
[9] R. Wongsathan and P. Supnithi "Channel response of HAMR with linear temperature-dependent coercivity and remanent magnetization,” in Conf. Rec. 2012 IEEE Int Conf. ECTI-CON, 2012, pp. 1-4.
[10] J.U. Thiele, K.R. Coffey, M.F. Toney, J.A. Hedstrom, and A.J. Kellock, "Temperature dependent magnetic properties of highly chemically ordered Fe55−xNixPt45L10 films,” J. Appl. Phys., vol. 91, no. 10, pp. 6595-6600, May 2002.
[11] P. Kovintavewat, I. Ozgunes, E. Kurtas, J.R. Barry and S.W. McLaughlin, "Generalized Partial-Reaponse Targets for Perpendicular Recording with Jitter Noise,” IEEE Trans. Magn., vol.38, no.5, pp. 2340-2342, Sep. 2002.
[12] H.N. Bertram, Theory of Magnetic Recording. Cambridge, U.K.: Cambridge Univ. Press 1994, ch. 5, pp. 107-138.
[13] B. Vasic and E.M. Kurtas, Coding and Signal Processing for Magnetics Recording Systems, Boca Raton, CRC PRESS 2005, ch. 2, pp. 2.2-1-2.2-26.
[14] P. Kovintavewat, Signal Processing for Digital Data Storage Volume II: Receiver Design, National Electronics and computer Techonology Center(NECTEC) 2007, ch. 3, pp. 43-64.
[1] O. Heinonen and K.Z Gao, "Extension of perpendicular recording," Journal of Magnetism and Magnetic Material, 2008, pp.2885-2888.
[2] Y. Shiroishi, K. Fukuda et al., "Future Options for HDD Storage," IEEE Trans. Magn., vol. 45, no. 10, pp. 3816-3822, Oct. 2009.
[3] E.M. Kurtas, M.F. Erden et al., "Future read channel technologies and challenges for high density data storage applications, Acoustics, Speech, and Signal Processing,” Proceedings of ICASSP 2005, pp. 737-740.
[4] T. Rausch, J.A. Bain, D.D. Stancil, and T.E. Schelsinger, "Thermal Williams-Comstock model for predicting transition lengths in heat-assisted magnetic recording system," IEEE Trans. Magn., vol. 40, no. 1, pp. 137-147, Jan. 2004.
[5] M.F. Erden, T. Rausch, W.A. Challener, "Cross-track location and transition parameter effects in heat-assisted magnetic recording,” IEEE Trans. Magn., vol. 41, no. 6, pp.2189-2194, Jun. 2005.
[6] R. Radhakrishnan, M.F. Erden et al., "Transition Response Characteristics of Heat-Assisted Magnetic Recording and Their Performance With MTR Codes," IEEE Trans. Magn., vol. 43, no. 6, pp. 2298-2300, Jun. 2007.
[7] R. Radhakrishnan, B. Vasic, M.F. Erden et al., "Characterization of of Heat-Assisted Magnetic Recording Channels,” DIMACS Series in Discrete Mathematic sand Theoretical Computer Science, vol. 73, pp. 25-41, 2007.
[8] M.H. Kryder, E.C. Gage et al., "Heat-Assisted Magnetic Recording,” Invited Paper Proceedings of the IEEE, vol. 96, no. 11: 1810-1835, Noember. 2008.
[9] R. Wongsathan and P. Supnithi "Channel response of HAMR with linear temperature-dependent coercivity and remanent magnetization,” in Conf. Rec. 2012 IEEE Int Conf. ECTI-CON, 2012, pp. 1-4.
[10] J.U. Thiele, K.R. Coffey, M.F. Toney, J.A. Hedstrom, and A.J. Kellock, "Temperature dependent magnetic properties of highly chemically ordered Fe55−xNixPt45L10 films,” J. Appl. Phys., vol. 91, no. 10, pp. 6595-6600, May 2002.
[11] P. Kovintavewat, I. Ozgunes, E. Kurtas, J.R. Barry and S.W. McLaughlin, "Generalized Partial-Reaponse Targets for Perpendicular Recording with Jitter Noise,” IEEE Trans. Magn., vol.38, no.5, pp. 2340-2342, Sep. 2002.
[12] H.N. Bertram, Theory of Magnetic Recording. Cambridge, U.K.: Cambridge Univ. Press 1994, ch. 5, pp. 107-138.
[13] B. Vasic and E.M. Kurtas, Coding and Signal Processing for Magnetics Recording Systems, Boca Raton, CRC PRESS 2005, ch. 2, pp. 2.2-1-2.2-26.
[14] P. Kovintavewat, Signal Processing for Digital Data Storage Volume II: Receiver Design, National Electronics and computer Techonology Center(NECTEC) 2007, ch. 3, pp. 43-64.
@article{"International Journal of Electrical, Electronic and Communication Sciences:66835", author = "P. Tueku and P. Supnithi and R. Wongsathan", title = "Target and Equalizer Design for Perpendicular Heat-Assisted Magnetic Recording", abstract = "Heat-Assisted Magnetic Recording (HAMR) is one of the leading technologies identified to enable areal density beyond 1 Tb/in2 of magnetic recording systems. A key challenge to HAMR designing is accuracy of positioning, timing of the firing laser, power of the laser, thermo-magnetic head, head-disk interface and cooling system. We study the effect of HAMR parameters on transition center and transition width. The HAMR is model using Thermal Williams-Comstock (TWC) and microtrack model. The target and equalizer are designed by the minimum mean square error (MMSE). The result shows that the unit energy constraint outperforms other constraints.
", keywords = "Heat-Assisted Magnetic Recording, Thermal Williams-Comstock equation, Microtrack model, Equalizer.", volume = "8", number = "3", pages = "572-7", }